用梁组墩扩展功能节约山区公路建桥投资●柳昌方长阳土家族自治县交通局公路是山区经济发展的基础建设。而山区公路建设难度大，周期长，费用高，尤为桥梁更甚，要跨越深山峡谷，施工场地狭窄，机械设备、材料等运送困难，施工技术难度大。老的建桥传统方法是：用土筑拱... Extend the function with the beam group pier to save mountain highway bridge investment ● Liu Changfang  Changyang Tujia Autonomous County Bureau of Transportation Highway is the mountainous area economy development basic construction. However, mountainous highway construction is difficult, long-term and expensive, especially for bridges. It is necessary to cross mountain valleys, narrow construction sites, difficulties in transportation of mechanical equipment and materials, and difficulties in construction technology. The traditional method of building bridges is: with soil arch ...